Duke Dox of Transylvania

Duke Dox of Transylvania (827-) was the Duke of Transylvania and Prince of the First Bulgarian Empire, as well as the heir to the County of Szekelyfold.

Biography
Dox was the son of King Presian of Bulgaria, and was an Orthodox Christian from the Bulgarian House of Balgarsko. Dox was the brother of King Boris I of Bulgaria and Duke Gavril of Moldau, two members of the Bulgarian nobility. Dox was enfeoffed as the Duke of Transylvania (present-day Romania) by his father before he died, and he was also a prince of Bulgaria and heir to the County of Szekelyfold.